https://techcrunch.com/2020/04/29/czi-teams-up-with-ucsf-and-stanford-to-research-covid-19s-prevalence-in-the-bay-area/

With $13.6 million in funding from the Chan Zuckerberg Initiative, a new  collaboration will pull together researchers at UCSF, Stanford and CZI-adjacent medical research nonprofit the Chan Zuckerberg Biohub to study the spread of COVID-19 in the Bay Area. The research team will conduct two separate large-scale studies over the course of nine months as part of the data-intensive public health effort, which seeks to answer some key questions about the virus that have eluded researchers.

For the first study, researchers will recruit 4,500 Bay Area residents who previously came up negative for the virus, testing them one time each month with both a serological test that detects antibodies and a polymerase chain reaction (PCR) test, which detects the presence of infection. Using viral genome data, the research teams hope to glean insight on the chain of transmission within the area as well as any evidence about how that the virus traveled into the community from outside the region.